package com.webserver.core;

import com.webserver.http.HttpServletRequest;

import java.io.*;
import java.net.Socket;

/**
 *  线程任务
 *  负责与特定的客户端进行HTTP交互.
 */
public class ClientHandler implements Runnable{
    private Socket socket;

    public ClientHandler(Socket socket){
        this.socket = socket;
    }

    public void run() {

        try {
            //1.解析请求
            HttpServletRequest request = new HttpServletRequest(socket);

            //2.处理请求
            String path = request.getUri();

            //3.发送响应
            //将./webapps/myweb/index.html响应给浏览器
            File file = new File("./webapps"+path);
             /*
                HTTP/1.1 200 OK(CRLF)
                Content-Type: text/html(CRLF)
                Content-Length: 2546(CRLF)(CRLF)
                1011101010101010101......
             */
            OutputStream out = socket.getOutputStream();
            //3.1发送状态行
            String line = "HTTP/1.1 200 OK";
            byte[] data = line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13); //写入回车符
            out.write(10); //写入换行符

            //3.2发送响应头
            line = "Content-Type: text/html";
            data = line.getBytes("ISO8859-1");
            out.write(data);
            out .write(13);
            out .write(10);

            line = "Content-Length: "+file.length();
            data = line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);
            out.write(10);

            //响应头写完，需要再写一个回车换行符表示写完
            out.write(13);
            out.write(10);

            //3.3发送正文部分
            FileInputStream fis = new FileInputStream(file);
            byte[] buf = new byte[1024*10];
            int len;
            while ((len = fis.read(buf)) != -1){
                out.write(buf,0,len);
            }
            System.out.println("响应发送完毕!");

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            //响应后断开连接
            try {
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }


}
